paolo@paolo-desktop:~$ java -version
java version "1.4.2"
gij (GNU libgcj) version 4.1.0 (Ubuntu 4.1.0-1ubuntu8)

Copyright (C) 2006 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
paolo@paolo-desktop:~$
Come si fa a vedere se iptables è installato e, in caso affermativo, sopparlo?